Carburetor Question - Is this a good call?

I don't think that 600 would be pig rich unless there is an issue with it. (power valve, float level, heavy float, shrunken metering block gaskets) or the like. That carb should make that 273 run sweet. Yes, it needs new plugs. 12y Champions or equivalent.

thanks Mike - back in 2004 when i first got it the carb worked fine for it.. so i know it COULD work for the car. Ive been convinced now that an adjustment like what you stated above would be a fix that would work. I believe the gaskets will all be OK since it WAS rebuilt not too long ago.. but im betting float, power valve, or jets need some help.